Supertex inc.
Simple 90V, 20mA, Temperature Compensated
Constant Current LED Driver IC
Features
►
5.0 to 90V operating range (V
A-B
)
►
20mA ±10% at 5.0 - 90V
►
0.01%/°C typical temperature coefficient
►
Available in TO-243AA (SOT-89), TO-252
(D-PAK), & TO-92 packages
►
Can be paralleled for higher current
CL2
General Description
The Supertex CL2 is a high voltage, temperature compensated,
constant current source. The device is trimmed to provide
a constant current of 20mA±10% at an input voltage of 5.0
- 90V. The device can be used as a two terminal constant
current source or constant current sink.
A typical application for the CL2 is to drive LEDs with a constant
current of 20mA. Multiple CL2s can also be used in parallel to
provide higher currents such as 40mA, 60mA or 80mA. The
device is available in TO-243AA (SOT-89), TO-252 (D-PAK),
and TO-92 packages.
Applications
►
LED driver
►
Industrial lamp indicators
►
Signage
►
►
►
►
Accent lighting
Automotive
Constant current source
Constant current sink
Typical Application Circuit
VA
Functional Circuit
Diagram
CL2
Up to 90V
+ V
LED(total)
100nF
VB
VA
+
Control Circuit
and Temperature
Compensation
I
LED
<20mA
V
LED(total)
-
VB
Doc.# DSFP-CL2
C071012
Supertex inc.
www.supertex.com
CL2
Ordering Information
Part Number
CL2K4-G
CL2N3-G
CL2N3-G P002
CL2N3-G P003
CL2N3-G P005
CL2N3-G P013
CL2N3-G P014
CL2N8-G
Package Options
TO-252 (D-PAK)
TO-92
TO-92
TO-92
TO-92
TO-92
TO-92
TO-243AA (SOT-89)
Packing
2000/Reel
1000/Bag
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
2000/Reel
VA
N/C
Pin Configurations
VB
VB
VA
NC
-G indicates package is RoHS compliant (‘Green’)
Refer to ‘P0xx’ Tape & Reel Specs for P002, P003, P005, P013, and P014 TO-
92 Taping Specifications and Winding Styles
TO-252 (D-PAK)
VB
TO-92
Absolute Maximum Ratings
Parameter
Operating voltage, V
A-B
Operating junction temperature, T
j
Storage temperature, T
S
Value
100V
-40°C to +125°C
-55°C to +150°C
VA
VB
N/C
TO-243AA (SOT-89)
Product Marking
Si YYWW
CL2
LLLLLLL
YY = Year Sealed
WW = Week Sealed
L = Lot Number
= “Green” Packaging
Absolute Maximum Ratings are those values beyond which damage to the
device may occur. Functional operation under these conditions is not implied.
Continuous operation of the device at the absolute rating level may affect device
reliability. All voltages are referenced to device ground.
Typical Thermal Characteristics
Package
TO-252
TO-92
TO-243AA
Power Dissipation
@T
A
= 25
O
C
(W)
O
TO-252 (D-PAK)
Package may or may not include the following marks: Si or
( C/W)
θ
ja
2.0*
0.6
1.3*
81*
132
133*
SiCL
2
YYWW
YY = Year Sealed
WW = Week Sealed
= “Green” Packaging
TO-92
Package may or may not include the following marks: Si or
* Mounted on FR4 board; 25mm x 25mm x 1.57mm
CL2W
W = Code for week sealed
= “Green” Packaging
TO-243AA (SOT-89)
Package may or may not include the following marks: Si or
Electrical Characteristics
(T = 25°C unless otherwise specified)
A
Sym
V
A-B
I
A-B
ΔI
A-B
/ΔT
T
j
R
A-B
Parameter
Operating voltage
Current regulation
I
A-B
temperature coefficient
Operating junction temperature
Dynamic resistance
Min
5.0
18.0
-
-40
-
Typ
-
20
0.01
-
300
Max
90
22
-
125
-
Units
V
mA
%/
O
C
O
Conditions
---
V
A-B
= 5.0V - 90V
V
A-B
= 45V, T
j
= -40
O
C to +100
O
C
---
---
C
kΩ
Doc.# DSFP-CL2
C071012
2
Supertex inc.
www.supertex.com
CL2
Functional Circuit Diagram
VA
Equivalent Block Diagram
VA
Control Circuit
and Temperature
Compensation
VB
VB
20mA
±10%
Temperature Characteristics
1.03
Current, normalized to 25°C
1.02
5.0V
45V
1.01
90V
1.00
0.99
0.98
-55
-35
-15
5
25
45
65
85
105
125
145
Temperature (°C)
Output Current vs Voltage
25
20
I
A-B
(mA)
15
10
5
0
0
10
20
30
40
50
60
70
80
90
100
V
A-B
Doc.# DSFP-CL2
C071012
3
Supertex inc.
www.supertex.com
CL2
CL2 for Multiple LED Strings
VA
VA
VA
VA
CL2
CL2
CL2
CL2
Up to 90V
+V
LED(total)
100nF
VB
VB
VB
I
LED
~20mA
VB
+
I
LED
~20mA
I
LED
~20mA
I
LED
~20mA
+V
LED(total)
-
CL2 for Higher Current
VA
VA
VA
CL2
CL2
CL2
Up to 90V
+V
LED(total)
100nF
VB
VB
VB
+
I
LED
~60mA
V
LED(total)
_
Doc.# DSFP-CL2
C071012
4
Supertex inc.
www.supertex.com
CL2
3-Lead TO-252 D-PAK Package Outline (K4)
b3
E
E1
L3
θ1
D1
D
H
A
c2
4
1
2
3
Note 1
L4
L5
b2
View B
e
b
Front View
Rear View
Side View
Gauge
Plane
L2
θ
L
L1
A1
Seating
Plane
View B
Note:
1. Although 4 terminal locations are shown, only 3 are functional. Lead number 2 was removed.
Symbol
Dimen-
sion
(inches)
MIN
NOM
MAX
A
.086
-
.094
A1
.000*
-
.005
b
.025
-
.035
b2
.030
-
.045
b3
.195
-
.215
c2
.018
-
.035
D
.235
.240
.245
D1
.205
-
.217*
E
.250
-
.265
E1
.170
-
.182*
.090
BSC
e
H
.370
-
.410
L
.055
.060
.070
.108
REF
.020
BSC
L1
L2
L3
.035
-
.050
L4
.025*
-
.040
L5
.045
-
.060
θ
0
O
-
10
O
θ1
0
O
-
15
O
JEDEC Registration TO-252, Variation AA, Issue E, June 2004.
* This dimension is not specified in the JEDEC drawing.
Drawings not to scale.
Supertex Doc. #:
DSPD-3TO252K4, Version E041309.
Doc.# DSFP-CL2
C071012
5
Supertex inc.
www.supertex.com
